rel=preload currently works only for cacheable resources. For web compatibility issues like bug Bug 1405761, rel=preload will be disabled on 57.
I intent to land rel=preload for non-cacheable resources as well in next couple of days. This will be on Firefox 58 and I will turn rel=preload back on when this lands. dragana _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform